Subversion Repositories or1k_soc_on_altera_embedded_dev_kit

/*

 * IEEE754 floating point

 * double precision internal header file

 */

/*

 * MIPS floating point support

 * Copyright (C) 1994-2000 Algorithmics Ltd.

 * http://www.algor.co.uk

 *

 * ########################################################################

 *

 *  This program is free software; you can distribute it and/or modify it

 *  under the terms of the GNU General Public License (Version 2) as

 *  published by the Free Software Foundation.

 *

 *  This program is distributed in the hope it will be useful, but WITHOUT

 *  ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 *  FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 *  for more details.

 *

 *  You should have received a copy of the GNU General Public License along

 *  with this program; if not, write to the Free Software Foundation, Inc.,

 *  59 Temple Place - Suite 330, Boston MA 02111-1307, USA.

 *

 * ########################################################################

 */

#include "ieee754int.h"

#define assert(expr) ((void)0)

/* 3bit extended single precision sticky right shift */

#define SPXSRSXn(rs) \

  (xe += rs, \

   xm = (rs > (SP_MBITS+3))?1:((xm) >> (rs)) | ((xm) << (32-(rs)) != 0))

#define SPXSRSX1() \

  (xe++, (xm = (xm >> 1) | (xm & 1)))

#define SPXSRSYn(rs) \

   (ye+=rs, \

    ym = (rs > (SP_MBITS+3))?1:((ym) >> (rs)) | ((ym) << (32-(rs)) != 0))

#define SPXSRSY1() \

   (ye++, (ym = (ym >> 1) | (ym & 1)))

/* convert denormal to normalized with extended exponent */

#define SPDNORMx(m,e) \

  while( (m >> SP_MBITS) == 0) { m <<= 1; e--; }

#define SPDNORMX        SPDNORMx(xm, xe)

#define SPDNORMY        SPDNORMx(ym, ye)

static __inline ieee754sp buildsp(int s, int bx, unsigned m)

{

        ieee754sp r;

        assert((s) == 0 || (s) == 1);

        assert((bx) >= SP_EMIN - 1 + SP_EBIAS

               && (bx) <= SP_EMAX + 1 + SP_EBIAS);

        assert(((m) >> SP_MBITS) == 0);

        r.parts.sign = s;

        r.parts.bexp = bx;

        r.parts.mant = m;

        return r;

}

extern int ieee754sp_isnan(ieee754sp);

extern int ieee754sp_issnan(ieee754sp);

extern int ieee754si_xcpt(int, const char *, ...);

extern s64 ieee754di_xcpt(s64, const char *, ...);

extern ieee754sp ieee754sp_xcpt(ieee754sp, const char *, ...);

extern ieee754sp ieee754sp_nanxcpt(ieee754sp, const char *, ...);

extern ieee754sp ieee754sp_bestnan(ieee754sp, ieee754sp);

extern ieee754sp ieee754sp_format(int, int, unsigned);

#define SPNORMRET2(s, e, m, name, a0, a1) \

{ \

    ieee754sp V = ieee754sp_format(s, e, m); \

    if(TSTX()) \

      return ieee754sp_xcpt(V, name, a0, a1); \

    else \

      return V; \

}

#define SPNORMRET1(s, e, m, name, a0)  SPNORMRET2(s, e, m, name, a0, a0)